148 CHAPTER 3 Income Statement and Statement of Stockholders' Equity CASES Case 3.1 Intel Case The 2013 Intel Form 10-K can be found at the following Web site: www.pearsonhighered .com/fraser. (a) Using the consolidated statements of operations, analyze the profitability of Intel by preparing a common-size income statement for the past three years. In addition, calculate sales growth and operating expense growth for each two- year period presented, as well as effective tax rates for all three years. (b) Using the consolidated statements of stockholders' equity for Intel, explain the key reasons for the changes in the common stock, accumulated other compre- hensive income, and retained earnings accounts. Evaluate these changes